<!DOCTYPE html>
<html lang="zh-CN">
<head>
    <meta charset="UTF-8">
  <meta name="viewport"
    content="width=device-width,initial-scale=1,minimum-scale=1,maximum-scale=1,user-scalable=no,viewport-fit=cover">
  <meta http-equiv="X-UA-Compatible" content="ie=edge">
  <title>MVC Demo</title>
</head>
<body>
    <div class="page">
        <section id="app1">
            <div class="output">
                <span id="number">100</span>
            </div>
            <div class="action">
                <button id="add1">+1</button>
                <button id="minus1">-1</button>
                <button id="mul2">×2</button>
                <button id="divide2">÷2</button>
            </div>
        </section>
        <section id="app2">
            <ol class="tab-bar">
                <li><span>1111</span></li>
                <li><span>2222</span></li>
            </ol>
            <ol class="tab-content">
                <li><span>内容1</span></li>
                <li><span>内容2</span></li>
            </ol>
        </section>
        <section id="app3">
            <div class="square"></div>
        </section>
        <section id="app4">
            <div class="circle"></div>
        </section>
        <script src="main.js"></script>
    </div>
    
</body>
</html>